Low-tension sparking mechanism for gas-engines.



APPLICATION FILED FEBJY, 1909.

Patented M0119, 1912.

/N VENTUR- MAM.

WI TNESSES ff j.. M

inarrnn stares narrar oracion HENRY J. Po-DLESK, or crircnoo, iLLinors.

LO'iV-TEN'SION SPARKING' MECHANISIVLFUR GAS-ENGINES.

I To all whom t may concern.'

Be it known that I, HENRY J. PoDLEsK, a `'citizen of the United States,residing in Chicago, county ofCook, and State of Illinois, have inventednew and useful Improvements in Low-Tension Sparking Mechanism forGas-Engines, of which the following is a clear, full, and exactdescription.i

The object of the present invention, broadly speaking, is to provide animproved possessing maximum mechanical efficiency, requiring small spaceand a small port through which the electrodes are introduced into thecombustion chamber, and so de signed as' to reduce the cost ofmanufacture to a minimum.

Other objects and advantages of this invention will appear in thefollowing specification and the accompanying drawings, in which:

Figure 1 is an elevation, partly sectional; Fig. 2 is a side elevation,showing the electrode actuating mechanism; Fig. 3 is another sideelevation, showing the sparking or Contact members and the port throughwhich the electrodes are introduced into the combustion chamber; Fig. iis a perspective, showing the packing face of the body or frame.

B is a body or frame, carrying the various parts; F is a machined facebetween which and asimilar face on the combustion chamber packing isplaced to secure an air tight joint; 3 is a round lug secured to B,

preferably made integral with it, and eX- tending laterally from theface F, forms an.

extension of the bearing a, for the movable electrode M, which isshouldered at f, a seat face on extremity oflug 3; m is an arm integralwith the electrode M, disposed at right angles thereto and carrying a.contact member, or point, 2, which is arranged. suitably to make contactwith a similar contact member on the head 1 of the stationary, insulatedelectrode, or bolt, S.

8 is a round Counterbore, extending from face F into the body B andterminates in a seat face 9; 1 4 is a round perforation through the bodyB, coaxial with the counterbore 8; 7 is a sleeve inserted into thecounterbore 8, seating on seat 9 thereof, and eX- tending laterally fromthe face F. The perforation in this sleeve 7 is coaxial with theperforation 14 and preferably of same Specification of Letters Patent.

Application filed February 17, 1%9.

lgatented Apr. 9, 1912. Serial No. 478,355.

l size, so as .to readily receive a bushing 6,

which should be' made of some non combustible insulating material.

insulating washers 5, are placed at each end of the insulatingl tube 6,thus affording complete insulation of the bolt S from the body B.

u is a nut by means of which the bolt S, thesleeve 7, tube 6, andwashers 5, are all 'secured together and to the frame B; 10 isconstruction of said sparking mechanism, 2-

a metal washer protectingthe washer 5, beneath it, from the nut u; thenut .l 1s for securing the circuit wire to S.

rlhe sleeve 7 may be secured into frame byc, this latter being pinned.fast to electrode/,fr

M bypin d; the torsion spring 11, coiledl around sleeve l), has one ofits ends engaged on pin y?A and the other on the striker arm "H, thespring acting to normally hold said striker arm H bearing on the pin p,which pin serves as a stop for the striker arm H; the torsion spring 12,coiled around sleeve c, has one of its ends enga ed on the striker arm Hand the other en on a pin d, the spring acting to normally hold theprojection L, of sleeve c, in Contact `with the striker arm H. Themovable electrode M is pinned to the sleeve c in such relation that theContact points 2 are separated about onesixteenth of an inch when thestriker arm H and t-he sleeve c are in normal position, that is, arm Hbearing against pin p and the projection 7L in contact with arm H.

The trip rod, or bar, T is so connected to some moving part of theengine that a reciprocating movement is imparted to it, in, operation,at suchperiod that the lip of this trip rod T, will actuate the strikerarm H so that the Contact points are brought together and then separatedat the proper period for ignition. that as the trip rod T is moved tothe right, Fig. 2, the lip t will engage the striker arm It will. beapparent H, moving it to the right, turning the sleeve b clockwise; themovable electrode li/l, re-

-whieh is pinned fast to the electrode M.

`When the arm H has been moved to some such position as shown by thedotted lines, the lipl 15 will trip oit, or disengage the arm H, whenthis will be impelled back by the two springs ll and l2, and strikea'haminerlike blow to the projection L, thus making a practicallyinstantaneous break .in the current that may be liowing through the contact points 2, the spark resulting troni this quick break being a mostetiieient one 'jor i vniting the combustible charges compressed in theeon'ibustion chamber oi a gas engine. n

It is well known that in the manufacture oit igniter mechanism, of theclass herein described, much diieulty is experienced in machining thetraine or body so as to secure efficient packing surfaces, seat surfaces-tor the movable electrode, ete., it being necessary, in theconstructions now in use, to re sort to numerous and expensive machiningoperations to obtain goed. results. This especially true in such caseswhere the port through which these parts or' the body, or frame,carrying the electrodes, and the electrodes themselves are introducedinto the combustion chamber, must be inade small, becauseot the smallcombustion chamber necessary to obtain the proper compression in smallengines and further the high compression necessary in all sizes otengines when alcohol is to be einliloyed as the il'uel. T he i gnitermechanism can, in such eases, be made smaller in size, but. then itscomponent parts become too small to be durable, are easily broken, henceexpensive in inaintenai'iee, and expensive to make. By employin@` niyconstruction,v it is possible to utilize. elec trodes, and hence otherparts as well, ot a substantial size, and y t have the port throughwhich the electrodes are inserted into the combustion chamber smallsize.

As will be appa rent', the body il can be properly machined at. very lowcost by eniploying a cliucking turret lathe, prov with'a suitable tuniekwhich will g body, in the rough, so that the tiene. line. tor bearing; ncoincides with center line the. lathe spindle; suitable tools arecarried in the turret and in the cross slides to t'ace the packing taceF; the seat face f, to turn the lng 3, to bore and reain the liearing7i, andto slightly groove or serrato the face if", all these operationsin one set-ting. rThe remaiiiing operations are simple and cheap.

I prefer not to thread the sleeve 7 into the body B, but to hold it inby the' elec-- trede, orbolt, S, as shown in Fig. wand oi relatively vusing asbestosfpaeking between the sleeve "7 and the seat 9; this notonly makes an a'ir tight joint, at low cost, but also affords' 'aflexible or resilient oint upon which the eX- pansion and contraction ofthe electrode S, due to heating and cooling, is taken up, in-

stead of beingtaken up upon the Washers 5,., which are preferably ofmica; the lite y of these washers is much prolonged and their etlieieneyis much increased by this, as they are kept tightI at all times,wl'iether the igniter is hot or cold. lt not necessary to insulate thesleeve 7, though this can be done. l

I have described and shown the preferred form of the coi'istruetion inmy invention.

l claim:

l. in sparking mechanism for gas engines, the combination of a trainehaving a packing 'lace and a lug` extending laterally trom saidt'aee'and terminating in a seatt'ace, a cylindrical perforation throughthe lugand the traine and substantially at. right angles to the packingi''ace, a shouldered with the said second perforation, an insulatin;-sleeve erdending` through the perforation ot' said sleeve and throughsaid second perforation. insulating washers at either end of theinsulating sleeve, av bolt passino' through said washers and the.insulating sleeve and rigidly clamping said washers and said sleeves tothe fraaie. a- Contact member on the end of the boltV extei'iding fromthe cylindrical sleeve, an arm secured to the end oi the rock shaftextending from the seat tace, and a econd contact. member securedto.said arm and adapted to make' intact with the first said contactmember.

lei markingA iiieliai'iisin for gas en- `fine-s, the combination oli a:trame having a 'i ace and `a lng extending laterally ace andterminating in a Fal perforation through a eeuiiterbore at` a .troia theanu extending' from 'ice into the frame, a second pei i ouah the traineeti-axial with and o'l` smaller size than the counterbore, a sleeveextending into the eoimterbore and relatively lone` fr than the depth ofthe counterhore, a bolt passiig through the Sleeve and said coaxialperforation'and insulatably tred te e hotly, a movable shouli'leret.fatali cylindrical perforation, the sliouldr et the shaft sea ting onthe seat tace on the lug, and an arm secured to the shouldered end ofthe shaft extending-lat.`

orally therefrom and adapted to make con- .tact with the head of saidbolt.

3. In sparking mechanism for gas engines, the Combination of a framehaving a packing face.; a lug` integral With said frame and extendinglaterally from and beyond the packing face and terminating in a .seatface, a perforation through the lug and through the frame, a shoulderedshaft passing through said perforation and extending beyond the frame,the shoulder seating on the seat face, a sleeve provided with an arm andloosely mounted on said shaft; a stop securedto the frame and adapted toengage the arm of said sleeve; 'a spring connected to said arm and theframe and adapted to normally hold said arm against. said stop; aprojection secured to said shaft and adapted to engage with said arm, asecond spring adapted to normally hold the projection in engagement withsaid arm, means for act-uating said arm, a second perforation throughthe frame at a distance from first said perforation, a counterboreextending from said packing face into the frame and coaxial with and oflarger diameter than said second perforation, a cylindrical sleeveWithin and. longer than the depth of sha ft and adapted to make contactwith that f end of the bolt projecting beyond said sleeve.

4. In sparking mechanism for gas engines, the combination of a framehaving a packing face, a lug integral With the frame and extendinglaterally from said face and terminating in a seat face, a cylindricalperforation through the lug and the frame and/. at right angles to theseat face, a counter! bore at-a distance from the lug and extending fromthe packing faceinto the frame7 a second perforation through the frameeoaxial with and of relatively smaller size than the counterbore, and aperforated bushing extending and tting into the counterbore andprojecting beyond the packing face.

In testimony whereof I have -signed my name to this specification in thepresence of two subscribing witnesses.

HENRY J. PODLESAK.

litnesses CARRIE E. JORDAN, .TENNIE L. Fisxn.

